William a



(No Model.) 2 Sheets-Sheet 1.

W. A. OORNBROOKS.

. DROP HAMMER. No. 524,311. Patented Aug. 14, 1894.

ILLIA A. CORN BROOKS, OFYMOLINE, ILLINOIS,ASSIGNOR r0 THE WILLIAMS, WHITE & COMPANY, or SAME PLACE.

DROP-HAMMER."

SPECIFICATION forming part of Letters Patent a... 524,311, dated. August 14, 1894.

Application filed April 27,1894. Serial in. 509,169.. (No model.)

To all. whom it may concern:

BROOKS, a citizen of the United States, residing at Moline, in the county of Rock Island means of rollers pressing against the faces of a board secured to-the ram. It has been common to provide these machines with mechanlSIIl whereby when the ram is allowed to fall,

it throws the rollers into action, whereupon the latter, acting upon the board, elevate the ram. When the ram reaches its elevated position, it throws the rollers out of action and again descends. This mechanism for throwing the rollers into and out of action is automatic in its action, and generally combined with manuallycontrolled mechanism by means of which the raising and releasing devices may be independently controlled.

The present invention relates to an improved automatic mechanism for throwing the raising or elevating rollers into and out of action. a

In the drawings,Figure 1 is a perspective View of my improved hammer; Figs. 2v and 3, perspective views of a portion of the same, with the parts in different positions; and Fig. 4, a detail sectional view.

A indicates the main frame of the machine; B the ram or hammer-head; O the elevating board or strap secured to the ram; andD D the elevating rollers which bear upon the broad fiat faces of the board and raise the ram. One ofthe rollers will be so mounted as to be capable of a slight movement toward and from its companion so as to relieve the board from pressure and allow the ram to fall; said movable roll, or the frame in which.

the said roll is mounted, being moved toward and from the fixed roller by means of a rod E. These parts are common and well known and need not be particularly described and shown. 4

Rod E is guided at its lower end by a lug a p g and is provided near its end with a notch or Be It known that I, WILLIAM A. Come.

In machines of this general character the ram or hammer-head is raised by shoulder b, which, when the rod is raised or. elevated, is engaged by a horizontally-movin g arm or latch .F. This latch or arm F is secured to a short upright rockshaft G journaled in the main frame, and is held normally against the rod E by means of a fiat spring H, secured at its upper end to the mainframe and bearing at its lower end against the tail Secured to the rockshaft vGr is an arm I which is held normally in a position to be acted upon by the incline d, formed. upon or secured to the ram; said incline in striking the arm forces the latter outward and causes the shaft to turn in its bearings. This movement of the shaft causes the latch to be withdrawnfrom engagement with the rod E. Secured to the rod E near the upper end thereof, is a block J which projects into the path of the ram, so that when the ram ascends,.it will strike the block, raise the rod, and throw the movable roll away from its companion. This block is adj ustably secured to the rod, so that the distance the ram may fall may be readily varied or controlled.

The operation of the mechanism is as follows: In the position shown in Fig. 1 the rolls D D are supposed to be thrown apart, the

rod to fall.

When the rod E falls, it carries themovable (eccentrically mounted) roller against the board 0 and causes these rollers to re- Just before the ram of the latch F from rod E, and permitting the go raise or elevate the ram. When the ram reaches nearly the limit of its upward move ment, it strikes the block J and lifts the rod E high enough to bring the notch b therein above the upper face of lug c, and as soon as this is done the spring H forces the latch into I00 the notch and holds the rod.

The parts are so arranged that the latch enthearmto-th'essh-aft'in such manner thatit;

the arm I. This mechanism works with less jar than in those machines whereina rod such as E 1S kllO'Ck9'd offi'a' she'l f iihIE-lllGfizH-Gd? face" of the arm I riding alongjfiheiincl ine d withouti any difticulty. The arm I and the latch F wlll be made of steel, and being small parts,v

may be readily replaced when worm'orinj uredi a 1} very important feature of the present machine resides in the fact that the arm I is made adj ustableupon-its1 shaiifi:&

If the dies are very thicle they'w-ill come together before the incline d acts upon the arm I; and in order to avoid this, I secure;

may be raised or lo wered as re uired; to"- 00111 pen'sate f'o r" varying; thi'bkHGSSGS of dies;

Thezshaft G will begrooved longitudi'naliy" as at e to receive" a key'f'carried by the" arm and th'ea'rm will be provided with. screws or bolts 9" by means of which it maybeola-mpedt in" any positionlengthwise of the "shaft; v

In speaking-- of the device 0' as a"; board, I; do-not'wish tobe understood as l'imifiingmz self to-a wooden'boa-rd, as I useath'e term a broadsenseand" intend to inel udethere by any of the. devices commonly employed; j Neitherdo I linri'tmyselt to any special construct'ion and arrangement ofrol l'ers forele vating the ra-m=,-.,as most any ot the mechanisms now im comm on; usea may he: used.

Having thus described my invention;- what a I claim is the main frame, rollers, ram and board;v.of lthe roller shi lit rod E," provided with a: notch I orsliould'er I); the? nockshaf t G provided. with arm Iand latch F, and a projection on the ramto engage arm I.

2i Era-drop hammer, the combination with the main frame, rollers, ram, and board; of 'the roller shift rodE, provided with notch or sheulder b the 'roekshat li- G provided with ;"l'atch- Fgan'd an arm I adj ustably secured to jthe shaft in position to be engaged by the ram.

3.. In a drop-hammemt'liie: combination with Tithe main frame, rol' lersgiramgtand boar-d2. of fit-he: roller shift rod E provided with at notch Zlatch F upon the upper face of the lug. to engagethe rodya; rocksl ra-ft G provided with with: thelatch; and. a; spring PI" acting u on tIiQYIBTtC'fiT to: throw it toward the: rod. Inwitness whereof I hereu'nitosetahand' in the" presence'of'two? witnesses.-

VVTIZJJIA'M (JO RNBROOKSZ Witnesses:

M10; .1. WILLrAM'fs,

HARRY AmswoRTH I. In a drop hammer, the combination with 5?); a 'lug a through which the rod passes; a

arm I tobe engaged by that-am, andcon nect'ed, 

